Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 806, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.150299
Keywords
Nano-ZnO particles; DTPA-extractable Pb; Microbial community composition; Soil enzyme activity; Metabolic quotient
Categories
Funding
- National Key Research and Development Program of China [2019YFC1806201]
- National Natural Science Foundation of China [41772264]
- Research Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection [SKLGP2020Z002]
Ask authors/readers for more resources
The study found that nano-ZnO has a significant detoxification effect on Pb-contaminated soil and can improve the microbial diversity and richness in soil at certain concentrations. However, the addition of nano-ZnO also reduces the pH of the soil, leading to changes in some enzyme activities.
In the present study, we investigated the responses of microbial respiration and community structure, enzyme activity and DTPA-extractable Pb within 60 days of incubation in soils treated with Pb and nano-ZnO. The results showed that when the concentration of nano-ZnO exceeded 10 mg/kg, the concentration of DTPA-extractable Pb significantly decreased by 10.6%-21.3% on the 60th day of the experiment. The addition of nano-ZnO decreased the Pb-contaminated soil pH from 6.18 to 6.08 at 7 days, which is part of the reason for the beta-glucosidase activity change. Ten mg/kg nano-ZnO significantly reduced the qCO(2) value, which represented the microbial energy demand for the conversion of carbon sources into biomass. Nano-ZnO improved the microbial diversity and richness of some metal-tolerant bacteria at 60 days. The findings provide deeper insight into the responses of soil microbes and Pb bioavailability in the presence of nano-ZnO particles. (C) 2021 Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available